Built-in API should be called with arguments of correct types

  • MISMATCHED_TYPE_OF_ARG
  • Error
  • High, Medium
  • No tags

This rule applies when built-in API is called with arguments of wrong types.

Because built-in has the specification for its arguments, arguments can cause error or unintended behavior if the types of arguments are wrong.

Noncompliant Code Example

View with compliant examples side by side
var arr = Array.from(items);
var pos_of_three = arr.findIndex(3); // MISMATCHED_TYPE_OF_ARG alarm because 'Array.prototype.findIndex' takes a function as an argument.

Compliant Code Example

View with noncompliant examples side by side
var arr = Array.from(items);
var pos_of_three = arr.findIndex(item => item === 3);

Version

This rule was introduced in DeepScan 1.4.0-beta.

See